include <bits/stdc++.h>

using namespace std; int main (){

int n,a,b,sum=0;
cin>>n;
b=n;
for (int i=0;i<3;i++){
	a=n%10;
	sum=sum+a*a*a;
	n=n/10;
}
if (sum==b)
cout<<"YES";
else
cout<<"NO";
return 0;

}